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      Question

      PQ is a line of length 18 cm. A point R is placed such

      that PR = 5 cm. If PR is increased by 40%, what percent does QR decrease?
      A 28.28% Correct Answer Incorrect Answer
      B 33.33% Correct Answer Incorrect Answer
      C 15.38% Correct Answer Incorrect Answer
      D 18.25% Correct Answer Incorrect Answer

      Solution

      ATQ,

      PQ = 18 cm

      PR = 5 cm

      Therefore, QR = 18 – 5 = 13 cm

      New PR = 1.40 Γ— 5 = 7 cm

      New QR = 18 – 7 = 11 cm

      Percentage decrease = {(13 - 11)/13} Γ— 100 = 15.38%

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